OFFSET
1,1
COMMENTS
Column 4 of A252343
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +6*a(n-2) +20*a(n-3) +54*a(n-4) +38*a(n-5) -41*a(n-6) -191*a(n-7) -285*a(n-8) +296*a(n-9) +753*a(n-10) -160*a(n-11) -791*a(n-12) -99*a(n-13) +334*a(n-14) +98*a(n-15) -18*a(n-16) +54*a(n-17) -3*a(n-18) -35*a(n-19) +3*a(n-20) -12*a(n-21) -7*a(n-22) +4*a(n-23) for n>25
EXAMPLE
Some solutions for n=4
..2..2..2..2..2..1....2..1..2..2..2..2....0..0..0..0..0..0....1..2..2..2..1..2
..2..2..2..2..2..2....2..2..2..2..1..2....0..0..0..0..0..0....2..2..2..2..2..2
..2..2..1..2..2..2....2..2..2..2..2..2....0..0..0..0..0..1....2..2..2..2..2..2
..2..2..2..2..2..2....1..2..2..2..2..2....0..1..0..0..0..0....2..2..2..2..2..2
..2..2..2..1..2..2....2..2..2..2..2..1....0..0..0..0..0..0....1..2..2..1..2..2
..1..2..2..2..2..2....2..1..2..2..1..2....1..0..0..0..0..0....2..2..2..2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved